If you preorder from DDD, they usually ship it out to arrive on or soon after release day.
The upgraded shipping usually doesn'thave any thing to do with order processing time--it's just that once it is shipped, it's shipped First Class or Priority or whatever instead of Media Mail.
My delay from DDD has been in getting the order processed. Once it gets processed, delivery is actually reasonably quick imho. Plus I don't usually mind waiting, especially with free shipping and DDD's good prices.
Warning: If you order multiple items, and request 'Expedited delivery' [that you pay for], and your order ships separately due to Backorder or Preorder *only the first item/s shipped will ship expedited*. So if you order is going to be split up, you might as well save the 5 bucks and go free shipping.